Historical Document

This Web site is provided by the Agency for Toxic Substances and Disease Registry (ATSDR)
ONLY as an historical reference for the public health community. It is no longer being maintained and the data
it contains may no longer be current and/or accurate.

PUBLIC HEALTH ASSESSMENT

EVALUATION OF CURRENT (1990 TO 2003) AND FUTURE CHEMICAL EXPOSURES IN THE VICINITY OF THE OAK RIDGE RESERVATION
U.S. DEPARTMENT OF ENERGY OAK RIDGE RESERVATION
OAK RIDGE, ANDERSON COUNTY, TENNESSEE

Doses were calculated using the following formula:
dose = ((second-tier screening concentration/1,000)×0.5 liters/day×12 days/year×30 years)/(70 kg×(365 days/year×70 years))
Risk was calculated by multiplying the exposure dose by EPA's oral cancer slope factor.
The second-tier screening concentrations are rounded.
*Chemical was detected in less than 10% of the samples. The second-tier screening concentration was estimated using 1/2 the detection limit for nondetected samples.§ The thallium and carbon tetrachloride data contained outliers that were three orders of magnitude higher than the second highest concentration. These data points were removed.
conc. = concentration
mg/kg/day = milligram per kilogram per day
ppb = parts per billion